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8+4.4z=-7.4
We move all terms to the left:
8+4.4z-(-7.4)=0
We add all the numbers together, and all the variables
4.4z+15.4=0
We move all terms containing z to the left, all other terms to the right
4.4z=-15.4
z=-15.4/4.4
z=-3+1/2
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